n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | -1 |
3 | 2 |
4 | 5 |
5 | 31 |
6 | 144 |
7 | 697 |
8 | 3335 |
9 | 15986 |
10 | 76589 |
11 | 366967 |
12 | 1758240 |
13 | 8424241 |
14 | 40362959 |
15 | 193390562 |
16 | 926589845 |
17 | 4439558671 |
18 | 21271203504 |
19 | 101916458857 |
20 | 488311090775 |
21 | 2339638995026 |
22 | 11209883884349 |
23 | 53709780426727 |
24 | 257339018249280 |
25 | 1232985310819681 |
26 | 5907587535849119 |
[0,1,-1,2,5,31,144,697,3335,15986,76589,366967, 1758240,8424241,40362959,193390562,926589845, 4439558671,21271203504,101916458857,488311090775, 2339638995026,11209883884349,53709780426727, 257339018249280,1232985310819681,5907587535849119] |